Jaguar XJ (X350). Manual — part 115

G256924t23 : CHECK THE RIGHT-HAND REAR AIR SPRING DRIVE CIRCUIT
FOR SHORT TO B+

1. Disconnect the right-hand rear air spring electrical connector, CR23. 2. Measure the voltage

between CR23, pin 02 (BG) and GROUND.

•

Is the voltage greater than 3 volts?

-> Yes

REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC.

TEST the system for normal operation.

-> No

GO to Pinpoint Test

G256924t24

.

G256924t24 : CHECK THE RIGHT-HAND REAR AIR SPRING DRIVE CIRCUIT
FOR SHORT TO GROUND

1. Measure the resistance between CR23, pin 02 (BG) and GROUND.

•

Is the resistance less than 10,000 ohms?

-> Yes

REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC.

TEST the system for normal operation.

-> No

GO to Pinpoint Test

G256924t25

.

G256924t25 : CHECK THE RIGHT-HAND REAR AIR SPRING DRIVE CIRCUIT
FOR HIGH RESISTANCE

1. Disconnect the battery negative terminal. 2. Disconnect the ASU electrical connector, CR89. 3.

Measure the resistance between CR23, pin 02 (BG) and CR89, pin 11 (BG).

•

Is the resistance greater than 5 ohms?

-> Yes

REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. CLEAR the

DTC. TEST the system for normal operation.

-> No

INSTALL a new air spring solenoid, CLEAR the DTC. TEST the system for normal operation.

PINPOINT TEST G256924p12 : C1430,
C1431, C1432; LEFT-HAND REAR AIR
SPRING DRIVE CIRCUIT
MALFUNCTION

G256924t26 : CHECK THE LEFT-HAND REAR AIR SPRING DRIVE CIRCUIT
FOR SHORT TO B+

1. Disconnect the left-hand rear air spring electrical connector, TL33. 2. Measure the voltage

between TL33, pin 02 (BK) and GROUND.

•

Is the voltage greater than 3 volts?

-> Yes

REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC.

TEST the system for normal operation.

-> No

GO to Pinpoint Test

G256924t27

.

G256924t27 : CHECK THE LEFT-HAND REAR AIR SPRING DRIVE CIRCUIT
FOR SHORT TO GROUND

1. Measure the resistance between TL33, pin 02 (BK) and GROUND.

•

Is the resistance less than 10,000 ohms?

-> Yes

REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC.

TEST the system for normal operation.

-> No

GO to Pinpoint Test

G256924t28

.

G256924t28 : CHECK THE LEFT-HAND REAR AIR SPRING DRIVE CIRCUIT
FOR HIGH RESISTANCE

1. Disconnect the battery negative terminal. 2. Disconnect the ASU electrical connector, CR89. 3.

Measure the resistance between TL33, pin 02 (BK) and CR89, pin 02 (BK).

•

Is the resistance greater than 5 ohms?

-> Yes

REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. CLEAR the

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DTC. TEST the system for normal operation.

-> No

INSTALL a new air spring solenoid, CLEAR the DTC. TEST the system for normal operation.

PINPOINT TEST G256924p13 : C1437,
C1438; REAR VERTICAL
ACCELEROMETER SIGNAL CIRCUIT

G256924t29 : CHECK THE REAR ACCELEROMETER SIGNAL CIRCUIT FOR
SHORT TO GROUND

1. Disconnect the ASU electrical connector, CR89. 2. Disconnect the rear accelerometer electrical

connector, TL34. 3. Measure the resistance between TL34, pin 02 (GO) and GROUND.

•

Is the resistance less than 10,000 ohms?

-> Yes

REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC.

TEST the system for normal operation.

-> No

GO to Pinpoint Test

G256924t30

.

G256924t30 : CHECK THE REAR ACCELEROMETER SIGNAL CIRCUIT FOR
SHORT TO B+

1. Measure the voltage between TL34, pin 02 (GO) and GROUND.

•

Is the voltage greater than 3 volts?

-> Yes

REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC.

TEST the system for normal operation.

-> No

INSTALL a new rear vertical accelerometer,

Rear Vertical Accelerometer (86.56.55)

CLEAR the DTC. TEST the system for normal operation.

PINPOINT TEST G256924p14 : C1457,
C1458; FRONT VERTICAL
ACCELEROMETER SIGNAL CIRCUIT

G256924t31 : CHECK THE FRONT ACCELEROMETER SIGNAL CIRCUIT FOR
SHORT TO GROUND

1. Disconnect the ASU electrical connector, CR89. 2. Disconnect the accelerometer electrical

connector, EC13. 3. Measure the resistance between EC13, pin 02 (G) and GROUND.

•

Is the resistance less than 10,000 ohms?

-> Yes

REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC.

TEST the system for normal operation.

-> No

GO to Pinpoint Test

G256924t32

.

G256924t32 : CHECK THE FRONT ACCELEROMETER SIGNAL CIRCUIT FOR
SHORT TO B+

1. Measure the voltage between EC13, pin 02 (G) and GROUND.

•

Is the voltage greater than 3 volts?

-> Yes

REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC.

TEST the system for normal operation.

-> No

INSTALL a new front vertical accelerometer,

Rear Vertical Accelerometer (86.56.55)

CLEAR the DTC. TEST the system for normal operation.

PINPOINT TEST G256924p15 : C1460;
ACCELEROMETER SENSOR SUPPLY
CIRCUIT FAULT

G256924t33 : CHECK THE ACCELEROMETER SENSOR SUPPLY CIRCUIT FOR
SHORT TO GROUND

1. Disconnect the ASU electrical connector, CR91. 2. Measure the resistance between CR91, pin 16

(Y) and GROUND.

•

Is the resistance less than 10,000 ohms?

-> Yes

REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC.

TEST the system for normal operation.

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